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17. 8. 2012.

Body fat percentage


Measuring body fat percentage is an easy method of discovering correct body weight and composition. Beneath the skin is a layer of subcutaneous fat, and the percentage of total body fat can be measured by taking the “skinfold” at selected points on the body with a pair of calipers. This test only requires four measurements.

Required resources

To undertake this test you will require:
  • Measurement calipers
  • Assistant.

Measurement sites

Take measurement from the following places:
1)      Triceps – with the arm resting comfortably at the side, take a vertical fold parallel to the long axis of the arm midway between the shoulder and the tip of the elbow.
2)      Subscapula – take a diagonal fold across the back, just below the shoulder blade.
3)      Biceps – with the arm resting comfortably at the side, take a vertical fold halfway between the elbow and top of the shoulder on the front of the upper arm.
4)      Suprailiac – take a diagonal fold following the natural line of the iliac crest, just above the hip bone.

How to conduct the test

The method is as follows:
  • Ensure that all of the skinfold measurements are located on the right side of the body and that the measurements are taken in millimeters.
  • Pick up the skinfold between the thumb and the index finger so as to include two thickness of skin and subcutaneous fat.
  • Apply the calipers about one centimeter from the fingers and at a depth about equal to the thickness of the fold.
  • Repeat the procedure three times as the measurement may vary and record the average value.
  • Add the results of each measurement to get a total value in millimeters.

Analysis

Using the total value obtained from the four measurements determine the percentage body fat from the table below:


Percent of fat. Males(Age in Years)
Percent of fat. Females(Age in Years)
Skinfold(mm)
17-29
30-39
40-49
50+
16-29
30-39
40-49
50+
15
4.8
-
-
-
10.5
-
-
-
20
8.1
12.2
12.2
12.6
14.1
17.0
19.8
21.4
25
10.5
14.2
15.0
15.6
16.8
19.4
22.2
24.0
30
12.9
16.2
17.7
18.6
19.5
21.8
24.5
26.6
35
14.7
17.7
19.6
20.8
21.5
23.7
26.4
28.5
40
16.4
19.2
21.4
22.9
23.4
25.5
28.2
30.3
45
17.7
20.4
23.0
24.7
25.0
26.9
29.6
31.9
50
19.0
21.5
24.6
26.5
26.5
28.2
31.0
33.4
55
20.1
22.5
25.9
27.9
27.8
29.4
32.1
34.6
60
21.2
23.5
27.1
29.2
29.1
30.6
33.2
35.7
65
22.2
24.3
28.2
30.4
30.2
31.6
34.1
36.7
70
23.1
25.1
29.3
31.6
31.2
32.5
35.0
37.7
75
24.0
25.9
30.0
32.7
32.2
33.4
35.9
38.7
80
24.8
26.6
31.2
33.8
33.1
34.3
36.7
39.6
85
25.5
27.2
32.1
34.8
34.0
35.1
37.5
40.4
90
26.2
27.8
33.0
35.8
34.8
35.8
38.3
41.2
95
26.9
28.4
33.7
36.6
35.6
36.5
39.0
41.9
100
27.6
29.0
34.4
37.4
36.4
37.2
39.7
42.6
105
28.2
29.6
35.1
38.2
37.1
37.9
40.4
43.3
110
28.8
30.1
35.8
39.0
37.8
38.6
41.0
43.9
115
29.4
30.6
36.4
39.7
38.4
39.1
41.5
44.5
120
30.0
31.1
37.0
40.4
39.0
39.6
42.0
45.1
125
30.5
31.5
37.6
41.1
39.6
40.1
42.5
45.7
130
31.0
31.9
38.2
41.8
40.2
40.6
43.0
46.2
135
31.5
32.3
38.7
42.4
40.8
41.1
43.5
46.7
140
32.0
32.7
39.2
43.0
41.3
41.6
44.0
47.2
145
32.5
33.1
39.7
43.6
41.8
42.1
44.5
47.7
150
32.9
33.5
40.2
44.1
42.3
42.6
45.0
48.2
155
33.3
33.9
40.7
44.6
42.8
43.1
45.4
48.7
160
33.7
34.3
41.2
45.1
43.3
43.6
45.8
49.2
165
34.1
34.6
41.6
45.6
43.7
44.0
46.2
49.6
170
34.5
34.8
42.0
46.1
44.1
44.4
46.6
50.0
175
34.9
-
-
-
-
44.8
47.0
50.4
180
35.3
-
-
-
-
45.2
47.4
50.8
185
35.6
-
-
-
-
45.6
47.8
51.2
190
35.9
-
-
-
-
45.9
48.2
51.6
195
-
-
-
-
-
46.2
48.5
52.0
200
-
-
-
-
-
46.5
48.8
52.4
205
-
-
-
-
-
-
49.1
52.7
210
-
-
-
-
-
-
49.4
53.0

The average man has 15 to 17% body fat, while the average woman is between 18 and 22%. Typical scores for elite athletes are 6% to 12% for men and 12% to 20% for women.

Normative data

The following table details the percentage body fat for male and female athletes for a variety of sports.

Sport
Male
Female
Baseball
12 – 15%
12 – 18%
Basketball
6 – 12%
20 – 27%
Cycling
5 – 15%
15 – 20%
Field&Ice Hockey
8 – 15%
12 – 18%
Rowing
6 – 14%
12 – 18%
Swimming
9 – 12%
14 – 24%
Track – Runners
8 – 10%
12 – 20%
Track – Jumpers
7 – 12%
10 – 18%
Track – Throwers
14 – 20%
20 – 28%
Triathlon
5 – 12%
10 – 15%
Volleyball
11 – 14%
15 – 16%

Target group

This test is suitable for active individuals but not for those where the test would be contraindicated.

Reliability

Reliability would depend upon how strict the test is conducted.

Validity

There are published tables to relate results to potential level of fitness and the correlation is high.

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